What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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unifr.ch

https://unifr.ch· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

unifr.ch

Mobile

Sponsored

Hosting Provider

Universite de Fribourg

IP Address

134.21.80.50

Server Location

🇨🇭 Fribourg, Switzerland

ASN

AS559

Organization

Universite de Fribourg

Server

Apache

Nameservers

siuftesun12.unifr.ch.siuftesun11.unifr.ch.scsnms.switch.ch.

Performance

Page Speed

1 MB

38 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

Infrastructure

Hosting

Universite de Fribourg

Technology Stack

11 Technologies Detected

Analytics

CSS Frameworks

Libraries

Other

Icon Libraries

Tag Managers

Advertising

Web Servers

SEO Analysis

C64/100

unifr.chunifr.ch

University of Fribourg - Home | | University of Fribourg

No description available for this page.

Title Length58 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Many images missing alt text (2/3)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

10 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

101d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

28.04.2025

Valid Until

29.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (4)

*.unifr.chunifr.chmyunifr.chwww.myunifr.ch

SHA-256 Fingerprint

E3:78:13:5D:23:04:34:8C:0E:04:9A:9B:79:16:90:CC:C7:F2:59:75...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔵 Public(public, no-transform)

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Tue, 17 Feb 2026 13:10:11 GMT

keep-alive

timeout=3, max=249

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mxa-00626501.gslb.pphosted.com

mxb-00626501.gslb.pphosted.com

Domain Information

unifr.ch

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Times New Roman

43/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

20/25

1.5x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Times New Roman

Serif24px

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

~185 CPL

Needs attention

24px

19px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Good hierarchy: Clear distinction between headlines and body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Risky: Text appears on background images without overlay protection.

❌ Very long lines: ~185 chars/line causes eye strain. Use max-width: 65ch.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

TikTok PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

analytics.tiktok.com(3)cdn.unifr.ch(3)googletagmanager.com(2)connect.facebook.net(2)

Website Identity

Facebook Instagram YouTube

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Last analyzed: 17 Feb 2026 at 13:10

Historical Analysis & Change Tracking